In some cases SolidWorks Composers users have reported missing annotations after updating the SMG document. This is likely due to a change in the import settings that differ from the original imported settings.
To view the imported settings within an SMG file, open the file in SolidWorks Composer and select File > Properties > Document Properties > Input. Make a note of the settings or take a screen capture of the window for reference.
When updating the document, compare the Import Settings in the "Choose Update File" dialog box to the settings document's Input settings. Ensure all settings match and continue with the update.
If the annotations are missing, please contact a support agent for further assistance.